Rotary pump.



J. JACOBSEN.

ROTARY PUMP.

APPLICATION FILED APR. 1. 1911.

Patehtod m 25, 1918.

Jason .mconsnn, or SAN rnanorsco, camronnm, ASSIGNOR or ONE-THIRD ro WILLIAM SAMUJEJLS AND onn-rnrnn 'ro nnuno w. HENNING, BOTH or sen FRANCISCO, CALIFORNIA.

Latc es.

ROTARY. PUMP.

Patentedilfune 25, TQJW.

Application filed April 7, 1917. Serial No. 160,395.

To all whom it may concern: Be it known that I, JAooB JAooBsEN, a citizen of the United States, residing in the city and county of San Francisco. and State of California, have invented new and useful Improvements in Rotary Pumps, of which the following is a specification. I

This invention relates to arotary pump. One of the objects of the present invention is to provide a simple, compact, substantial,- cheaply manufactured rotary pump comprising a cylindrical casing, a piston turnably mounted and eccentrically positioned within the casing, a head member on each end of the casing, in one of which is journaled a driving shaft supporting the piston while the other carries a stationary shaft centrally positioned with relation to the cylindrical casing, and a plurality of radially positioned vanes turnably mounted on the stationary shaft and extending through slots formed in the piston. The invention also comprises a novel ball bearing support for the driving shaft and piston and turnably mounted guiding members for the vanes. Further objects will hereinafter appear.

Having reference to the accompanying drawings Figure 1 is a central, vertical, cross section through the pump.

Fig. 2 is a section on line 22 of Fig. 1. Fig. 3 is a perspective view of-one of the Fig. 4 is a perspective View of oneof the vanes. Referring to the drawings in detail, A

' indicates a cylindrical-shaped casing, in-

all

tih'

teriorly of which is mounted a piston 2. Formed integral with one ;end of the casing or otherwise secured thereto is a head member 3, in which is journaled a driving shaft 4 supportin the piston. Secured to the head member 5 and extending through said head member and rigidly secured therein is a stationary shaft 6, which is centrally positioned with relation to the cylindrical casing. The shaft 4: and the piston supported thereby are eccentrically positioned with relation to the casing, thereby forming a fluid passage 7 in the upper port1on of the casing which communicates wlth an intake passage 8 and a discharge passage 9.

The piston proper is cored out or hollow,

as shown at 10, and is furthermore radially of the casing is a removable slotted and provided with recesses 11 for the reception of the vaneguides 12. These vane guides are in reality pins of suitable diameter which are longitudinally slotted,

as at 13, to permit the vanes to pass therethrough, andthe pins are sufiiciently long to form perfect bearings and guides :from end to end of each individual vane. vanes consist of rectangular shaped plates The 14, extending through the slottedportions of the guides 12 and each vane is provided Withan inwardly extending arm 15' and a bearing ring 16 which embraces the stationary shaft 6. The position of the arms and the bearing rings 16 varies, as shown in Fig. 2. That is, two vanes ill have the arms formed on the ends of the lades on opposite sides, as shown at 17 and 18 while the other two vanes will have their arm extensions approximately shown in Fig. 4:.

centrally positioned, as

In actual operation when assembling the pump as here shown, it is first necessary to insert the shaft 4 and the piston in the direction of arrow a. The vane guides or slotted pins 12 are then placed in the piston pocket and the vanes inserted through the slotted portions 13. An exterior ring 19 is then applied to the face of the piston and is secured thereto by "screws 20 or any other to the bearing support of the vanes will in this manner cause each vane to become retracted and extended with relation to the piston once during each revolution; the extended position of the blades taking place gradually during their passage through the upper chamber 7. Water or other fluid *handled by the pump is in thisv manner taken from the intake and discharged through the outlet 9, and practically any pressure desired may be obtained as'leakage losses will be comparatively small. This can'sreadily be seen if the pump is handling water, oil,

or like material, by referring to Fig. 1, as

- lar ball races shown at 21 and 41, and lubri- 25 held against contact with the inner surface of the cylindrical casing by means of the stationary shaft. That is, clearance of athousandth of an inch may be successfully maintained between the outer ends of the blades and the inner surface of the casing, thereby entirely relieving friction which has heretofore been extremely objectionable in pumps of this type. Friction is also.reduced in the main shaft hearing by providing the annucation of the bearing rings is also taken "care of by the lubricating cup 42 which delivers oil through the stationary hollow shaft to the individual bearings. Friction and leak--. age losses are in this manner taken care of throughout the pump and a high efliciency and comparatively long life are maintained without constantrepairs and adjustment.

The materials and finish of the several parts of the pump are such as the experience and judgment of the manufacturer may dietate. I

'I wish itiinderstood that various changes in form, proportions and details of construction may beresorted to within the scope of the appended claims and that I do not wish to limit myself to the specific design and construction here shown.

v I-Iaving thus described my invention, what I claim and desire to secure by- Letters Patent is ment, and concentrically arranged means connecting the vanes. 2. A rotary pump comprising a cylindrical casing, a piston eccentrically positioned Within the casing and driven from a shaft extendingthrough one side of the casing, a

stationary shaft secured in the opposite end of the casing and centrally positioned therein, said shaft extending through one end of the piston, a plurality of vanes turnably mounted on the stationary shaft extending through slots formed in the piston, and turnably mounted slotted members in the piston opened at one end and forming guides for the vanes and provided with closed ends journaled in the piston.

3. A rotary pump comprising a cylindrical casing, a rotary piston eccentrically disposed therein and radially slotted, each slot opening at one end through the piston and formed with a bearing recess extending beyond the opposite end of the slot, a bearing pin journaled in the bearing recess and formed with a slot extending through one end in coincidence with the piston slot, the closed end of the bearing pin journaling in the extension of the bearing recess, a vane slidably and rockably supported by the bearing pin, and a concentric shaft arranged in thecasing and connected to the vane.

4. A rotary pump comprising a cylindrical casing, a rotary piston eccentrically disposed therein and radially slotted, each slot opening at one end through the piston and formed with a bearing recess extending beyond the opposite end of the slot, a bearing pin journaled in the bearing recess and formed with a slot extending through one end in coincidence with the piston slot, the closed end of the bearing pin journaling in the extension of the bearing recess, a vane slidably and rockably supported by the bearing pin, a concentric shaft arranged in the casing and connected to the vane, and means removably closing the openedends 0f the slots to hold the vanes therein.

5. A rotary pump comprising a cylindrical casing, a rotary piston eccentrically disposed therein and radially slotted, each slot opening at one end through the piston and formed with a bearing recess extending beyond the oppositeend of the slot, a bearing pin journaled in. the bearing recess and formed with a slot extending through one end in coincidence with the piston slot, the closed end of the bearing pin journaling in the extension of the bearing recess, a vane slidably and rockably supported by the bearing pin, a concentric shaft arranged in the casing and connected to the base, and a ring detachably securedto the iston across the opened ends of the slots or retaining the vanes operative.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JACOB JACOBSEN. 

